Optical electronegativity, χ*, of transition-metal ions in simple compounds

Abstract

The difference between simple binary compounds and complexes is discussed in the context of charge-transfer (electron-transfer) absorption spectroscopy and correlations involving the optical electronegativities χ* and χ_opt. Using existing data, mainly for binary chlorides and bromides, values of χ* are obtained for Cr³⁺, Mn²⁺, Fe²⁺, Co²⁺, and Ni²⁺, and applied to binary sulphides and doped zinc sulphide crystals.